AMD traditionally has been respinning their GPUs quite a bit. For the Radeon RX 400 series the 570/580 products will be based on 14nm FinFET+ Polaris 20 being fabbed at Samsung and Global Foundries’ 14nm FinFET-based process technology, which is the densest foundry process available. FinFET transistors are crucial to reducing power consumption and enabling operating voltages that are 150mV lower than the previous generation, thereby cutting active power by 30% from a 1V baseline.

Radeon RX 480 and 580 are 100% similar in terms of technology.

For the last five years, graphics processors have relied on 28nm high-k/metal nodes. We have moved towards 3rd gen 14nm FinFET. Basically, the Polaris 20 GPU is based on 36 shader clusters with 64 shader processors each. So that makes a nice 2304 shader processors in total. For the RX 570 however there are 32 out of the 36 Cus enabled, boiling down to 2048 Shader processors whereas the RX 580 has 2304. These shader partitions are tied to 32 ROPs.

TMUs wise for a fully enabled unit AMD has always used a 4:1 ratio meaning 36 CUs x 4 = 144 texture units, which is a good number. Memory sits on a 256-bit wide bus spread over the 64-bit controllers. Polaris 20 (XT) runs its memory reference at 7000 MHz for the 4GB model and 8000 MHz for the 8 GB model.

Radeon

R9 Fury X

RX 580

RX 480

RX 570

RX 470

RX 460

Fabrication Process

28 nm

14 nm

14 nm

14 nm

14 nm

14 nm

GPU

Fiji

Polaris 20 XTX

Polaris 10

Polaris 20 Pro

Polaris 10

Polaris 11/Baffin

Shader procs

4,096

2,304

2,304

2,048

2,048

896

Graphics memory

4 GB HBM

4 GB / 8 GB GDDR5

4 GB / 8 GB GDDR5

4 GB / 8 GB GDDR5

4 GB / 8 GB GDDR5

2 GB / 4 GB GDDR5

Memory Clock

up-to 500 MHz / 1.0 Gbps

8.0 Gbps

7.0 / 8.0 Gbps

7.0 Gbps

6.6 Gbps

7.0 Gbps

GPU Clock Max

1,050 MHz

1,340 MHz

1,267 MHz

1,244 MHz

1,206 MHz

1,200 MHz

Memory Bandwidth

up-to 512 GB/s

224 GB/s (4 GB)256 GB/s (8 GB)

224 GB/s (4 GB)256 GB/s (8 GB)

224 GB/s

211 GB/s

112 GB/s

Power Connectors

2 x 8-pin

1 x 6-pin

1 x 6-pin

1 x 6-pin

1 x 6-pin

NA or 1 x 6-pin

Form Factor

Dual slot

Dual slot

Dual slot

Dual slot

Dual slot

Dual slot

Freesync

Yes

Yes

Yes

Yes

Yes

Yes

DirectX 12 Support

Yes

Yes

Yes

Yes

Yes

Yes

With the introduction of series 500, AMD will launch four lines of series 500 products:

Let me chart up a more complex model with specs and overviews, some of the RX 550/560 specs are not yet finalized though yet math brings me to the proper TMU count etc:

AMD Radeon

RX 580

RX 570

RX 560

RX550

R9 390X

Graphics Core

Polaris 20 XTX

Polaris 20 Pro

Polaris

Polaris

Grenada

Fabrication Process

14 nm FinFET

14 nm FinFET

14 nm FinFET

14 nm FinFET

28 nm

Single Precision

6.1 TFLOPs

5.1 TFLOPs

~2 TFLOPs

3.48 TFLOPS

5.9 TFLOPS

Memory

4/8 GB GDDR5

4/8 GB GDDR5

2/4 GB GDDR5

2/4 GB GDDR5

8 GB GDDR5

Clock Frequency Base / Boost

1,257 MHz1,340 MHz

1,168 MHz1,244 MHz

1,175 MHz1,275

1183 MHz

1,050 MHz

Compute Units

36

32

14

8

44

Shader Processors

2304

2048

1024

512

2816

Memory Interface

256-bit

256-bit

128-bit

128-bit

512-bit

ROPs

32

32

16

8

64

TMUs

144

128

56

32

176

Memory Speed Effective

8 Gbps

7 Gbps

7 Gbps

TBA

6.0 Gbps

Memory Bandwidth

256 GB/s

211 GB/s

112 GB/s

TBA

384 GB/s

TDP

185 W

150 W

75 W

TBA

275 W

MSRP

$199 (4 GB)$229 (8 GB)

$149 (4 GB)$179 (8 GB)

$99 (2 GB)$119 (4 GB)

$199

$399

Though GCN is now at iteration revision 4 we feel that the GPU architecture has remained very similar and is comparable to the last-generation products, hence the die-shrink at 14nm is where the biggest advantages are to be found as well as supporting more features in line with HDMI 2.0 and DP 1.4. As you can see, it's a lot of the same but a bit faster. This RX500 series release is aimed at people who haven't updated in say a year or two.

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